Samsung Tab4 User Manual page 20

Rotating the Screen
Many applications allow display in either portrait or
landscape orientation. Rotating the device causes the display
to automatically adjust to fit the new screen orientation.
To prevent the display from rotating automatically, open the
Notification Panel and deselect Screen rotation.
Note: Some applications do not allow screen rotation. Some
applications display a different screen depending on the
orientation. For example, the calculator turns into a
scientific calculator when rotated to landscape.
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Sweeping
Sweep your hand across the screen to capture a screenshot.
The image is saved in
Note: It may not be possible to capture a screenshot while
using some applications.
Covering
Cover the screen with a palm to pause media playback.
Gallery Screenshots album.